.alert {
    position: absolute;
    left: 0;
    top: 0;
    right: 0;
    bottom: 0;
    cursor: default;
    display: -webkit-box;
    -webkit-box-pack: center;
    -webkit-box-align: center;
    -webkit-box-orient: vertical;
    .mask {
        position: absolute;
        left: 0;
        top: 0;
        right: 0;
        bottom: 0;
        background: rgba(0, 0, 0, 0);
        transition: background ease-out 1s;
    }
    .box {
        background: white;
        border-radius: 3px;
        box-shadow: 3px 5px 10px #736d6d;
        transition: all ease-out .3s;
        opacity: 0;
        transform: translateY(50px);
        background: white;
        min-width: 300px;
        z-index: 99999;
        padding:10px 0 0 0;
        .content {
            font-size: 13px;
            padding: 20px;
        }
        .btns {
            text-align: right;
            line-height: 30px;
            padding: 0 10px 10px 10px;
            .btn {
                display: inline-block;
                vertical-align: top;
                padding: 0 10px 0 10px;
                font-size: 12px;
                &:hover {
                    color: blue;
                }
            }
        }
    }
    &.in {
        .mask {
            background: rgba(0, 0, 0, 0.1);
        }
        .box {
            opacity: 1;
            transform: translateY(0);
        }
    }
}